Basis of Acoustic Analysis

What is the basis of acoustic analysis?

The sound will recognize the vibration generated in the air (the compressional wave of pressure). In the human audible range, 20Hz- 20Hz, there are features such as amplification and the offset that can be expressed as a formula to express the pressure level.

There are three types of acoustics relating to the increasing aerodynamic noise source. The mach number is low. The influence of the quadrupole is 0.3 and the Jukyokuko will be dominant.

For more details on the basis of sound, refer to this document.